posix/wordexp.h

   1 /* Copyright (C) 1991-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _WORDEXP_H
  19 #define _WORDEXP_H      1
  20
  21 #include <features.h>
  22 #define __need_size_t
  23 #include <stddef.h>
  24
  25 __BEGIN_DECLS
  26
  27 /* Bits set in the FLAGS argument to `wordexp'.  */
  28 enum
  29   {
  30     WRDE_DOOFFS = (1 << 0),     /* Insert PWORDEXP->we_offs NULLs.  */
  31     WRDE_APPEND = (1 << 1),     /* Append to results of a previous call.  */
  32     WRDE_NOCMD = (1 << 2),      /* Don't do command substitution.  */
  33     WRDE_REUSE = (1 << 3),      /* Reuse storage in PWORDEXP.  */
  34     WRDE_SHOWERR = (1 << 4),    /* Don't redirect stderr to /dev/null.  */
  35     WRDE_UNDEF = (1 << 5),      /* Error for expanding undefined variables.  */
  36     __WRDE_FLAGS = (WRDE_DOOFFS | WRDE_APPEND | WRDE_NOCMD
  37                     | WRDE_REUSE | WRDE_SHOWERR | WRDE_UNDEF)
  38   };
  39
  40 /* Structure describing a word-expansion run.  */
  41 typedef struct
  42   {
  43     size_t we_wordc;            /* Count of words matched.  */
  44     char **we_wordv;            /* List of expanded words.  */
  45     size_t we_offs;             /* Slots to reserve in `we_wordv'.  */
  46   } wordexp_t;
  47
  48 /* Possible nonzero return values from `wordexp'.  */
  49 enum
  50   {
  51 #ifdef __USE_XOPEN
  52     WRDE_NOSYS = -1,            /* Never used since we support `wordexp'.  */
  53 #endif
  54     WRDE_NOSPACE = 1,           /* Ran out of memory.  */
  55     WRDE_BADCHAR,               /* A metachar appears in the wrong place.  */
  56     WRDE_BADVAL,                /* Undefined var reference with WRDE_UNDEF.  */
  57     WRDE_CMDSUB,                /* Command substitution with WRDE_NOCMD.  */
  58     WRDE_SYNTAX                 /* Shell syntax error.  */
  59   };
  60
  61 /* Do word expansion of WORDS into PWORDEXP.  */
  62 extern int wordexp (const char *__restrict __words,
  63                     wordexp_t *__restrict __pwordexp, int __flags);
  64
  65 /* Free the storage allocated by a `wordexp' call.  */
  66 extern void wordfree (wordexp_t *__wordexp) __THROW;
  67
  68 __END_DECLS
  69
  70 #endif /* wordexp.h  */